This is coming from someone who wanted to play Groudon, couldn’t afford to play Groudon, and played Groudon.
What I chose to do was buy the Tropical Beaches, play Groudon, and sell the beaches. I didn’t lose any money (I sold them for what I paid for them), and they were very easy to sell to a vendor at a large tournament because the card is in demand. I got to live the dream and play Groudon with all four beaches at a Regionals and broke even.
The deck really is not viable without the beaches.